1. Usergrid
Open Source
Mobile Backend on
Cassandra

2. Hi I m
Ed Anuff

3.
API Management
API Analytics
API Tools

4. Usergrid
Backend-as-a-
Service
& Open Source
Mobile and
Rich client apps

5. App, Cloud, & HTTP

6. No Web Stack
Page
Templates
MVC Logic
Database

7. Just Apps and APIs

8. Key Capabilities
A platform not a single app
Flexible data model
Easy to use from any
language

9. Why should
Cassandra
developers care
about Usergrid?

10. Open Source (APLv2)
Built on Hector
Multi-tenant (Virtual
Keyspaces)
JSON and full-text indexing
Rich permissions model
REST API

11. Multi-tenant data for
Apps

12. Lots of Teams...
Team
Team
Team

13. Lots of Apps...
App
App
App
Team

14. And App Users...
App
Team

15. And data and
devices
App
Team

16. Multi-tenancy at
scale
App
App
App
App
App
App
Team
Team
Team

17. Schema
Separate Database
Shared Database
Shared
- Scalability
+ Scalability
+ Isolation
- No Isolation
+ Simple
- Complicated
Separate
Schema
- Scalability
- Scalability
+ Isolation
- No Isolation
+ Not Complicated
- Complicated

18. CREATE DATABASE
ALTER TABLE

19. Sharding SQL is too
much work.
Oracle is too much
money.

20. What about NoSQL?
Most NoSQL works
at the wrong
abstraction level.

21. Does Cassandra
provide any more
options?
Sort of

22. Schema
Separate Keyspace
Shared Keyspace
Shared
Expensive
Interesting
Separate
Schema
Very
Unwieldy
Expensive

23. How would Shared
Schema/Shared
Keyspace work?

24. Users = {
"4e3c0423-…" : {
username: "edanuff",
email: "ed@anuff.com",
… : …
},
"e5d61f2b-…" : {
username: "jdoe",
email:
"john.doe@gmail.com",
… : …
}
}

25. Users = {
"4e3c0423-…" : {
username: "edanuff",
email: "ed@anuff.com",
… : …
},
"e5d61f2b-…" : {
username: "jdoe",
email:
"john.doe@gmail.com",
… : …
}
}

26. Conventional Row Keys In Single Keyspace
Row UUID
Row UUID
Row UUID
Row UUID
Row UUID
Row UUID

27. Multi-tenant Row Keys In Shared Keyspace
Tenant ID
Row UUID
Tenant ID
Row UUID
Tenant ID
Row UUID
Tenant ID
Row UUID
Tenant ID
Row UUID
Tenant ID
Row UUID

28. Wonderful, more
things for me to build
myself in the app
tier...
Hold that thought...

29. Shared Schema/
Shared Keyspace is
Virtual Keyspaces
Part of Hector Client

30. public static <E> Keyspace
createVirtualKeyspace(
String keyspace,
E keyPrefix,
Serializer<E> kps,
Cluster cluster);

31. Hector hides the Tenant Prefixes
Prepend Tenant UUID
Hector
Cassandra
Remove Tenant UUID

32. What about indexes?
Hector doesn t filter
results
Don t add a tenant column
App-tier CF indexes
preferable

33. What about CQL?
See previous slide for index
limitations
Hector doesn t currently
support Virtual Keyspaces via
CQL
I don t actually ever use CQL

34. So what else is in
there?

35. JSON
Full JSON values,
fully indexed, using
Jackson and stuff
from Lucene

36. Permissions
Fine grained, per
user, built on Shiro

37. REST
Full REST API, built
on Jersey

38. Anything else?

39. Mongo Compatible
API
Experimental Mongo
API emulation via
Netty
Mongo binary wire

40. That s what
Usergrid is.

41. Use the ideas
Use the code
Use the cloud

42. usergrid.com
git.io/usergrid
Thanks!